A temperamental star

This stunning, multi-temperamental image combines different wavebands into a single, beautiful portrait of the Sun. The coolest colours represent, in fact, the hottest temperatures, whereas reds represent a relatively comfortable temperature of 60,000 Kelvin.

' A full-disk multiwavelength extreme ultraviolet image of the sun taken by SDO on March 30, 2010. False colors trace different gas temperatures. Reds are relatively cool (about 60,000 Kelvin, or 107,540 F); blues and greens are hotter (greater than 1 million Kelvin, or 1,799,540 F). Credit: NASA'

Source: NASA

Most prominent: the SDO has captured a prominence eruption. Source: NASA

Here's an older image of coronal loops. The tiny blue blob is a proportional representation of the Earth. 

From NASA:

'Coronal loops are fountains of plasma (a gas made up of electrically charged particles) trapped by the sun's magnetic fields. Coronal loops look like giant arches sticking out of the solar surface, and many are large enough to span several Earths.'